package com.yky.config;

import com.yky.utils.TraceIdUtil;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class LogInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String traceId = request.getHeader(TraceIdUtil.TRACE_ID);
        if (!StringUtils.hasLength(traceId)) {
            TraceIdUtil.setTraceId(TraceIdUtil.generateTraceId());
        }
        else {
            TraceIdUtil.setTraceId(traceId);
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        TraceIdUtil.remove();
    }
}
